Jar-closure.



No. 847,640.-- PATENTED MAR. 19, i9o7.

; V JAR CLOSURE.

APPLICATION FILED DBO. 26,1906.

71 l 'IWESSES 3 1. V VEW TOR Baa ZZZ;

. Y miomeys.

THE numus PETERS co., wn snmcnzu, b. c.

UNITED S ATES PATENT orrron- WALTER E. BOSTWICK, OF ALGONAC, MICHIGAN.

JAR-CLOSURE.

no. 847,640. Specification of Letters Patent. Patented March 19, 1907.

Application filed December 26, 1905. Serial No. 293.180.

To all whom it may concern.-

Be it known that I, WALTER E. BOSTWICK, a citizen of the United States, residing at Algonac, county of St. Clair, State of Michigan,

have invented a certain new and useful Im- Lil following to be a full, clear, and exact description of the same, such as will-enable others skilled in the art to which it pertains To to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to closures for jars. It has for its object an improved sealing cloi tight joint. I sure for preserving-jars.

In the drawings, Figure 1 is a perspective of a jar and cover. Fig. 2 is a section, showing the cap. and the manner in which it engages on the neck of the jar. Fig. 3 is a perspective of the top of the jar. Fig. 4 is aperplace has the cap 1.4 spective of a disk which covers the hole in the pressed down tightly. top of the jar. disk which covers the disk of Fig. 4. Fig. 6 is a section of an air-extractor used in sealing the jar.

The body of the jar is of any approved design, having a neck 1, around the top ofwhich is a projection 2 of smaller diameter, leaving a shoulder 3. When the projection emerges from the main part 1 of the neck,

the neck is adapted to hold a gasket 4.

The cap is provided with a flaring flange 6, that engages tightly on the gasket 4. The

from under the disk.

the disk 9 is the valve.

possible.

5 per or external side of the cap, concentric with the hole 7, is a recess 8 of a size to receive a sealing-disk 9. A recess 10, of larger diameter, is concentricwith the hole 7 and forms a receptacle for a securing-disk 11.

4 The sealing-disk 9 is of any flexible material impervious to air, preferably a small disk of drawn away from its seat or may quite flexible rubber. The securing-disk 11 is of any suitable material, preferably piece of paper covered with cement.

recesses 8 and 10 have coaxial cylindrical walls and flat bottoms. The bottom of the recess 8 is smooth to serve as a valve-seat, and the bottom of the recess 10 forms an annular surface surrounding the recess 8 and serving also as a valve-seat.

'The residuum of air left in the jar after it handling without becoming unsealed.

What I claim is has been nearly filled with the material to be preserved is drawn therefrom by means of a tubular nipple 12, made of sufficiently durable material to withstand the slight airpressure which will be developed and prorovement in J ar-Closures; and I declare the vided at its base end with a cavity 13, in

which the disk 9 has free movement andample room to yield, and allow the air within the jar to escape through the hole 7 and out ple 12 engages the annular surface surrounding the recess 8 and should engage so closely therewith as to make a substantially air- The several parts thus assembled, naniely the jar-top, the nipple, and the disk 9constitute an air-pump, in which In use the jar filled nearly full of material to be preservedand having the gasket 4 in laced thereon and The sealing-disk 9 is Fig. 5 is a perspective of, a then placed loosely over the hole 7, and nipple 12 is then seated on the annular surface surrounding the recess 8, with the cavity 13 so located with respect to the hole 7 and the cavity 8 that the sealing-disk 9 may yield upward readily into the cavity 13, and the air is drawn'out from the jar through the nipple to as great an extent as is practically This may be done by means of an air-pump connection, which is not shown, or it may be done by applying the mouth to the nipple and withdrawing the air by suction. cap also has a central hole 7, and on the up- Upon opening the nipple or allowing the air to flow into it again the sealing-disk 9 is pressed down tightly on its seat and prevents the air from entering the jar, and the jar is now sealed and may remain in this condition indefinitely; but inasmuch as the sealingdisk 9 is flexible and light it may be easily be accidentally displaced therefrom, and to prevent a this a protecting-disk 11 is placed over it and The preferably secured to its seat by a cement, which may be a simple paste or mucilage. Thus prepared the jar with its contents may be handled with considerable roughness and will stand transportation and all ordinary An implement for use 1n extracting air In testimony whereof I sign this specifics tion in the presence of two Witnesses.

through and a seating-rim and a flexible disk 1 adapted to coact with said tube as a valve WALTER BOSrlVVICK' 'n as e elosure to the Witnesses:

, MAY E. KOTT, substantially as described. 0. 0. JENNINGS. 

